package com.itheima.reggie.service.impl;

import  com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import  com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import  com.itheima.reggie.common.CustomException;
import  com.itheima.reggie.entity.Category;
import  com.itheima.reggie.entity.Dish;
import  com.itheima.reggie.entity.Setmeal;
import  com.itheima.reggie.mapper.CategoryMapper;
import  com.itheima.reggie.service.CategoryService;
import  com.itheima.reggie.service.DishService;
import  com.itheima.reggie.service.SetmealService;
import  org.springframework.beans.factory.annotation.Autowired;
import  org.springframework.stereotype.Service;
@Service
public  class  CategoryServiceImpl extends  ServiceImpl<CategoryMapper,Category>
implements  CategoryService{
@Autowired
private  DishService dishService;
@Autowired
private  SetmealService setmealService;
/**
* 根据分类id删除分类，删除之前需要进行判断
*/
@Override
public  void  remove(Long id) {
LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new  LambdaQueryWrapper<>();
//添加查询条件，根据分类id进行查询
dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
int  count1 = dishService.count(dishLambdaQueryWrapper);
//查询当前分类是否关联了菜品，如果已经关联，抛出一个业务异常
if (count1 > 0){
//已经关联菜品，抛出一个业务异常
throw  new  CustomException("当前分类下关联了菜品，不能删除");
}
//查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper =
new  LambdaQueryWrapper<>();
//添加查询条件，根据分类id进行查询
setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
int  count2 = setmealService.count(setmealLambdaQueryWrapper);
if (count2 > 0){
//已经关联套餐，抛出一个业务异常
throw  new  CustomException("当前分类下关联了套餐，不能删除");
}
//正常删除分类
super .removeById(id);
}
}
